SectionWhat SJR is

SJR was launched in 2007 by the SCImago Research Group, a research unit based at the University of Granada, Spain, and the Consejo Superior de Investigaciones Científicas (CSIC). It was designed to address a well-known limitation of the Impact Factor: the assumption that every citation has equal weight. In the Impact Factor framework, a citation from a niche, low-cited journal counts exactly as much as a citation from a flagship journal like Nature or Science.

SJR rejects that assumption. Instead, it treats the citation network as a prestige network, where influence flows from more important journals to less important ones — much like how Google’s PageRank algorithm treats links from authoritative websites as more valuable than links from unknown sites. ### Why SJR matters for researchers – It accounts for citation quality, not just quantity. Two journals with the same raw citation count can have very different SJR scores if one is cited by top-tier journals and the other by lower-tier ones.

– It is field-normalized. SJR adjusts for differences in citation behavior across disciplines, making it more meaningful to compare journals in different fields. – It is free and transparent. Unlike the Journal Impact Factor, which requires a JCR subscription, SJR scores are freely available to anyone.

SectionHow SJR is calculated

SJR uses an iterative, eigenvector-based algorithm similar to Google’s PageRank. The core idea is that a journal’s prestige depends not only on how many citations it receives, but on the prestige of the journals that cite it. ### The SJR algorithm in plain terms 1.

Build the citation network. Every journal in Scopus is a node. Every citation from one journal to another is a directed link. 2.

Assign initial weights. All journals start with equal prestige. 3. Propagate prestige. A journal transfers its prestige to the journals it cites.

If Journal A is highly prestigious and cites Journal B, Journal B gains prestige from A. 4. Iterate until convergence. The algorithm repeats the prestige transfer until the scores stabilize.

The final stable values are the SJR scores. ### The SJR formula The exact computation involves matrix algebra, but the conceptual formula can be expressed as: SJR = (Total weighted citations received) ÷ (Total number of documents published in the last 3 years) Where each citation is weighted by the prestige of the citing journal and further adjusted by: – Field-normalization: Citation potential varies by discipline. SJR accounts for this by comparing a journal’s citations to the expected citation rate in its field.

– Self-citation cap: Excessive self-citations are suppressed to prevent manipulation. ### Key parameters of SJR | Parameter | Value | |———–|——-| | Citation window | 3 years (rolling) | | Document types | Articles, reviews, conference papers | | Source database | Scopus (Elsevier) | | Prestige weighting | Yes (PageRank-style) | | Field normalization | Yes (inherent) | | Self-citation adjustment | Yes (capped) | | Cost to access | Free |

SectionSJR vs Impact Factor vs SNIP

Understanding how SJR differs from the two most common alternatives — the Impact Factor and SNIP — is essential for choosing the right metric for your evaluation. ### Comparison table: SJR vs Impact Factor vs SNIP | Feature | SJR | Impact Factor | SNIP | |———|—–|—————|——| | Developer | SCImago Research Group | Clarivate (Eugene Garfield) | Elsevier / CWTS (Leiden) | | Source database | Scopus | Web of Science | Scopus | | What it measures | Prestige-weighted citations per document | Raw citations per citable item | Field-normalized citations per document | | Citation weighting | Yes — prestigious citations count more | No — all citations equal | No — all citations equal | | Field normalization | Yes (inherent) | No (JCI is field-normalized) | Yes (explicit correction) | | Citation window | 3 years | 2 years (standard) | 3 years | | Self-citation handling | Suppressed if excessive | Suppressed if excessive | Suppressed if excessive | | Cost | Free | Subscription (JCR) | Free | | Best for | Comparing prestige across fields | Traditional journal reputation | Comparing citation impact across fields | ### When to use SJR over Impact Factor Use SJR when: – You want to account for citation prestige, not just volume. – You are comparing journals across different disciplines.

– You need a free, transparent metric. – You are evaluating journal influence in a network context. Use Impact Factor when: – You need the metric most recognized by hiring committees and promotion boards.

– You are evaluating within a single field where IF is well-calibrated. – Your institution explicitly requires IF data for assessment. ### When to use SJR over SNIP Both SJR and SNIP are field-normalized and free, but they differ in philosophy: – SJR measures prestige.

It asks: “How important are the journals that cite this journal?” – SNIP measures citation efficiency. It asks: “How much does this journal get cited relative to what is expected in its field?” A journal with a high SNIP but moderate SJR might be highly efficient at attracting citations within its niche but may not be seen as a prestige destination by top-tier journals. Conversely, a journal with a high SJR but moderate SNIP might be prestigious but operate in a field where citations are scarce.

SectionHow to look up SJR scores

### Method 1: SCImago Journal & Country Rank (Free) 1. Go to www.scimagojr.com 2. Enter the journal name or ISSN in the search bar.

3. Click on the journal title to view its full profile. 4.

The SJR score is displayed prominently, along with historical trends, quartiles, and related journals. ### Method 2: Scopus (Institutional access) If your institution has a Scopus subscription: 1. Go to www.scopus.com 2.

Navigate to “Sources” in the main menu. 3. Search for the journal.

4. The SJR score appears alongside CiteScore, SNIP, and document counts. ### Method 3: Journal-specific pages on ImpactFactorForJournal.com For quick reference, our journal detail pages display the latest SJR score alongside the Impact Factor, CiteScore, and quartile rankings, updated annually from Scopus data.

SectionWhat counts as a good SJR score by field

SJR scores are field-dependent, so a “good” score in one discipline may be modest in another. Below are approximate benchmarks based on 2025 Scopus data. ### SJR score benchmarks by discipline | Field | Top 10% (Q1) | Top 25% (Q2) | Median | Lower 25% (Q4) | |——-|————-|————-|——–|—————-| | Multidisciplinary sciences | >3.0 | 2.0–3.0 | 1.0–2.0 | <1.0 | | Biology & biochemistry | >2.5 | 1.5–2.5 | 0.8–1.5 | <0.8 | | Medicine | >2.0 | 1.2–2.0 | 0.6–1.2 | <0.6 | | Chemistry | >1.8 | 1.1–1.8 | 0.6–1.1 | <0.6 | | Physics | >1.5 | 0.9–1.5 | 0.5–0.9 | <0.5 | | Computer science | >1.2 | 0.7–1.2 | 0.4–0.7 | <0.4 | | Social sciences | >1.0 | 0.6–1.0 | 0.3–0.6 | <0.3 | | Arts & humanities | >0.5 | 0.3–0.5 | 0.1–0.3 | <0.1 | ### How to interpret your journal's SJR - SJR > 3.0: Elite journal.

Often multidisciplinary or top-tier specialty journal. Comparable to journals with Impact Factors above 10–15. – SJR 1.5–3.0: Highly respected journal.

Strong presence in its field. Good target for tenure-track researchers. – SJR 0.8–1.5: Solid, well-regarded journal.

Appropriate for most established researchers. – SJR 0.4–0.8: Mid-tier journal. Good for early-career researchers or niche studies.

– SJR < 0.4: Lower-tier or emerging journal. Verify editorial standards before submitting. ### Important caveats – SJR is not an Impact Factor. An SJR of 1.5 does not correspond to an IF of 1.5.

The scales are different because of the prestige weighting and field normalization. – Use quartiles. SJR quartiles (Q1–Q4) are often more informative than raw scores because they show where a journal sits relative to others in its field. – Check the trend. A journal with a rising SJR may be gaining influence; a declining SJR may signal problems or field shifts.

Key Takeaways

• SJR weights citations by source prestige.
• It uses a PageRank-like algorithm.
• SJR scores are free on SCImago.
• Same citation count can yield different SJR scores.

FAQPeople also ask

What does SJR stand for?

SJR stands for SCImago Journal Rank.

Is SJR better than Impact Factor?

SJR addresses different limitations.

Where can I find SJR scores?

SJR scores are freely available on the SCImago portal.

Does SJR use Scopus data?

Yes. SJR is calculated using citation data from Elsevier’s Scopus database.

SourcesReferences & further reading

• SCImago Journal Rank
• SCImago Research Group
• Scopus Sources